20432236105 has 16 divisors (see below), whose sum is σ = 24640197120. Its totient is φ = 16264962432.

The previous prime is 20432236087. The next prime is 20432236109. The reversal of 20432236105 is 50163223402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20432236105 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20432236109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 920781 + ... + 942709.

It is an arithmetic number, because the mean of its divisors is an integer number (1540012320).

Almost surely, 2^20432236105 is an apocalyptic number.

It is an amenable number.

20432236105 is a deficient number, since it is larger than the sum of its proper divisors (4207961015).

20432236105 is a wasteful number, since it uses less digits than its factorization.

20432236105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22848.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 20432236105 its reverse (50163223402), we get a palindrome (70595459507).

The spelling of 20432236105 in words is "twenty billion, four hundred thirty-two million, two hundred thirty-six thousand, one hundred five".